Stroke-jointer



(No Model.) 3 Sheets-Sheety 1. E. JENNBRv/G. EISERER. STROKE JOINTER.

No. 37 .293 Patented Nov. 15, 1887.

3 Sheets-Sheet 2.

(No Model.)

E. JENNER 8v CT. EISERER.

STROKE JOINTBR.

N Pinna Hummm-4pm. wmingnn. n c,

(Normaal.) 1 l ashe'ets-s-heet 3. E. JENNER & G. EISERER.

STROKE JOINTER. l

No'. 373,293. Patented Nov. 15, 188,7.

fw f I if -Ja N. PETERS. Pnuwulhogmpner. Wamingnx. D4 C.

` A' UNITED STATES .PATENT OFFICE.

ERNSTJENNER AND GEORG EisEER, OF OHIOAGO, ILLINOIS.

STROKE-'JolNl-Ea.

SPECIFICATION forming part of Letters Patent No. 373,293, dated November15, 1887.

application filed May a1, 1887. sel-m1 No. 239,804. (Nomodel.)

To all whom z5 may concern.-

Beit known that. we,`.E1 2NsT. JENNR and GEORG` EIsERERjsubjecrs of theEmperor of Germany, residing at Chicagmin the countyy ofl Cook andvState of Illinois, have inventedj certain vnew 'and useful Improvementsrin` Stroke-Jointers, of which the following is aj specification,reference being had therein to the accompanying drawings;

This invention relates to machines for planingr the edges of planksgorstrips to be per-j fectly straight and smooth for. forming close!Machines for that, Vpurpose have heretofore generally -consisted ofjoints when put together.

a frame guiding the reciprocating.planer-head and provided with anadjustable support for holding the plank or strip to b e planed, and ofa shaft journaled in standard-bearings secured'upon the floor somedistance away from the machine, and having mounted loose and tightpulleys for driving by a belt and a balance-wheel, with a. cranklpinconnected with the planer-head by a pitman for reciprocatingl suchplaner-head. This arrangement for thus transmitting a reciprocatingmovement has many disadvantages-it takes up much floor room in the shop,the strain ,and momentum of reciprocation being sustained by the floorcause the entire building tol shake, and the long pitman thus projectingendangers t-he workmen.

vide a machine that is compact and complete within asingle frame inwhichthe distance ofre-i ciprocation of theplaner-head can be instantly adjusted, and wherein .the momentum ofreciprocation is counteracted; andwith these Objects vin view our invention consists of the novel devicesand combinations of devices hereinafter described and specifically.claimed.

In the accompanying drawings, Figures 1 and 2 represent side elevationsofthe machine,

showing the planer-head on its two opposite 1egs,1, andhavingadovetailed groove, 2,

vserted the planer-knives 8 and 4, one above vand the other below adividing-strip, 5.

Upon the front edge and against the`front face of frameA is secured theboard-supporting frame C by a thumb screw, 6, passed ,through a slot, 7,in the .pendent iiange 8, and

adj nstably holding it byaset-screw, 1l, passed f planednin its uppersurface for. guiding the planer-head B, that in its vertical face `hasin through such slot and tapped into a prot'uber-` ance, l2, of frame C,that enters the slot in bracket 10, for guiding the same. The lower endof the vertical leg of each-T shaped bracket 1() has a lug, 13, tappedby a screw, 14:, andthese screws 14 are pivotedin eye-lugs 15 of frameC, and have collars 16 and sprocket-wheels 17, that hold the screwsvertically, and one of these screwshas formedto its Vlower end a crank,18. VAu endless chain, 19,

stretched oversprocket-wheels 17, will cause both screws 14. to movesimultaneously, and as turned by crank 18 in one direction or ani 1other to raise or lower the brackets 10. Now, it is the object of ourinvention to pro` Upon the rear ends of T-shaped brackets 10 is securedbyV hinges the rear edge of table D,` the front edge of which issupported on the Apoints of set-screws 20, tapped through the forwardends of brackets 10, for adjusting table D to a horizontal or angularposition.

The upper planer-knife, 3, is to be adjusted for cutting a heavy chip,wherefore the board to be planed on its edge is supported on the shelfof standard 9 and on strip 5, after which the smooth cut is made by thelower planerknife, 4, wherefore the board is placed upon the table D,butting against standard 9;

So 'far described 1 thedevices, excepting slot 7 Of frame c, andthumbscrew 6, for adj ustably securing frame C, are old, and we do not`claim the same, and now we will proceed with describing our improvementsin devices for reciprocating the planer-head.

In a bracket-bearing, 21, secured against ICC screw, 26, the crank-pin27.

one of the legs l, and a standard-bearing, 22, secured upon the iloor isjournaled the driving-shaft E, having loose and tight pulleys 23 and 24for driving by a belt, and having mounted upon its end a disk, 25,radially slotted for adjustably securing by a thumbrIhis crank-pill27,by a pitman, 2S, is connected with a crankpin, 29, that is rigid witha wheel, F, having two grooves in ils periphery for the ends of a rope,30, passed around the same from opposite directions about one-half itsperiphery, and is secured thereon. This rope 30 is wound over asmallerpulley, G, mounted upon a shaft, 31, upon which is also mounted apulley, H, that is also provided with two grooves in its periphery.

rlhe shafts ot'whecls F and G H are pivoted between longitudinal barssecured against legs 1.

Grooved guide-1mlleys I I' are pivotcd with their journals in boxes32,horizontally guided in brackets 33, secured against the opposite endsof frame A and provided with screws 34, for adjusting these boxes 32. Toa couplinglink, 35, secured to the pendant 36, that is bolted to berigid with planerhead B, are secured the ends of two ropes, 37 and 3S.The rope 37, being passed over pulley I, is then passed with itsopposite end over about onehalf of the circumference of pulley H, and issecured thereto, while the rope 3S is passed over pulley I', and thenover pulley H in the direction opposite to rope 37, and is securedthereon, both ropes 37 and 3S being stretched taut by moving pulleys Iand I by means of screw 34. rlhe rotating movement of the main shaft Ewill tlansmit an oscillating movement to wheel F, which angle ofoscillation may be increased or decreased by shifting thc crank-pin 27away from or toward the shaft E. This oscillation of wheel F beingtransmitted to wheels G and H by rope 30 in an increased proportion, theropes 37 and 3S again will transmit it to the planer-head to bereciproeated thereby, and for the purpose of breaking the momentum ofreeiprocation to a certain extent the link 35 may be connected to thependant 36, with interposed rubber blocks, that will make the pullelastic in either direction.

A further device applied to prevent shaking of the machine from themomentum of reciproeation consists in providing the disk 25 with camprojections 39, which,just at the point where the crank-pin passes thepoint reversing the motion, come in contact with a small roller, 40, ofa lever, 41, pivoted at about its center in a bracket, 42, that is rigidwith the frame, while its upper end connects with a rod, 43, that ispassed through a rubber spring, 44, at the opposite end of frame A,

and is adjustably contracted against such spring by a nut, 45. Theroller 40 will thus act as a brake forpreventing a backlash of the partsat the end of cach stroke of planerhead B.

It will he noticed that a machine thus constructed is complete within acompact framework, so as to occupy but little space, and is arranged tobe easily adjusted for different lengths of boards or strips to beplaned for jointing, and the operating parts are so constructed thatthey cannot readily get out of order. v

Vhat we claim isl. The combination, with-the planerhead and frame inwhich it is guided, of pulleys pivoted to the opposite ends of theframe, a pulley located below said frame, suitable mechanism foroscillating such lower pulley, and ropes secured to the planer-head,passed over the pulleys on thc ends of the fraineand wound in oppositedirections upon the lower pulley and secured thereto, substantially asset forth.

2. The combination, with frame A and planer-head B, having pendant 36,of pulleys I I at opposite ends of the frame, pulley H beneath theframe, pulley G, secured on shalt with pulley H, pulley F, located onseparate shaft, main shaft E, having crank-disk 25 and pitman 2S, ropes37 and 33, connecting pendant 36 with pulley H in opposite directions,passing over the pulleys I l', and the rope 30, connecting pulleys G andF, substantially as described.

3. The conibination, with frame A and planer-head B, having` pendant 36,of pulleys I l at opposite ends of frame A, pulleys H, G, and F belowthe frame, arranged as described, main shaft E, and disk 25, providedwith radially-adjustable crank-pin 27, and pitman 28, ropes 37 and 3S,connecting pendant 36 with pulley H in opposite directions and passingover pulleys I I, and rope 30, connecting pulleys G and F.

4. The combination, with the reciprocating planer-head B, and ropes,substantially as described, connected thereto, of the rotating shaft E,having the crank-disk 25, for operating the planer-head through the saidconnections, eam projection 39, provided upon the crank-disk, the lever41, having roller 40, bearing on rim of disk 25, rod 43, connected toopposite end of lever 41, and spring 44, all substantially as and forthe purpose set forth. In testimony whereof we affix our signatures inpresence, of two witnesses.

ERNST JENNER. GEORG EISERER. Vitiiesses:

WILLIAM H. Lorz, Or'ro LUnKnR'r.

